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3 Context Are agreed service levels met? Overall how many applications are healthy vs non-healthy? Is the health getting worse over time? Are the business functions being performed as expected? Do you have capacity within applications? 3

7 Challenges - Overview Detect performance degradation: Single malfunctioning application on a guest has a potential to degrade performance of host and other resources Resource contention among applications executing on VMs may hamper performance Virtual machines not configured with sufficient resource to handle workload 7

14 Challenges Network Level Resource-aware monitoring fabric Monitoring the functioning of both systems and applications running on large-scale distributed systems Continuous collecting detailed attribute values - A large number of nodes - A large number of attributes Overhead increases quickly as the system, application and monitoring tasks scales up 14

17 CPU CPU saturated? High Ready time Problematic if it is sustained for high periods Possible contention for CPU resources among VMs Workload Variability? Resource limits on VMs? Actual over commitment? High SwapWait time 17

18 Memory Swap in rate Swap out rate Swap used 18

19 Disk What should I look for to figure out if disk is an issue? IOPs? Bandwidth (read/write)? Latencies? 19

20 Network What should I look for to figure out if network is an issue? Packate rate? Bandwidth (read/write)? NIC status? 20

25 Key Highlights Scale dynamically Have minimum (or no) impact on the monitored infrastructure Should be portable and has to be light weight Easy feature customization. Not all metrics will need to be monitored in the cloud for everyone Heavy network based monitoring tools may not be a good fit 25

28 Summary Cloud is complex; monitoring needs are indispensable End user response time is primary focus Cloud services must be treated differently to on-premise software when it comes to systems monitoring Do not rely on vendors completely. If SLAs are serious, maintain your own logs Existing tools are good but use programmatic APIs for specific needs 28

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